Statement of Other Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 31.8	$ 93.1	$ 212.9	$ 219.2
Other comprehensive income (loss), net of tax:
Currency translation	39.9	(24.3)	16.6	(8.0)
Marketable securities	6.1	(10.0)	(22.8)	8.3
Defined benefit pension plans	2.0	1.7	5.9	5.1
Other postretirement benefit plans	(0.3)	(0.4)	(0.9)	(1.1)
Total other comprehensive income (loss), net	47.7	(33.0)	(1.2)	4.3
Comprehensive income	79.5	60.1	211.7	223.5
Comprehensive income attributable to noncontrolling interest	19.1	16.4	45.5	73.4
Comprehensive income attributable to Valhi stockholders	$ 60.4	$ 43.7	$ 166.2	$ 150.1